With the last commit the detection of archives is insensitive to the case for the extension.

I did a few quick tests and this seem to work OK. All in all i feel your feature proposal is performing reasonably good now. When more users will enable to test and use it. What could happen is some issue or a glitch could emerge you will need to address then. But this is true for a lot of other features in FreeCAD 017 too. Therefore as far as i am concerned i don't see an issue if this feature gets added to FreeCAD 0.17.

verb
Push one's lips or one's bottom lip forward as an expression of petulant annoyance or in order to make oneself look sexually attractive.
‘she lounged on the steps, pouting’
with object ‘he shrugged and pouted his lips’

HAH! I wasn't aware that the second definition was in the dictionary. Typically it is something children do when they're not getting what they want. But undoubtedly women do it as well, for different reasons

Don’t you think there are better subjects than typo error to discuss about?
I make my best not to make too many mistakes, but sometimes there are some I do not detect before I send the post. A few minutes ago I did not even know what pout means and I have had also to use the dictionary. I was thinking put of course!
Sorry for that!